Motor driver current sensing
US11418137B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2021 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Apr 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor driver includes a low-side drive transistor, a comparator, a sense transistor, first switch, and a second switch. The low-side drive transistor is adapted to be coupled to a motor. The comparator is configured to determine a direction of a drive current flowing in the low-side drive transistor. The sense transistor is coupled to the low-side side drive transistor and is configured to pass a replica of the drive current. The first switch is configured to couple the sense transistor to the low-side drive transistor responsive to the drive current flowing in a first direction through the low-side drive transistor. The second switch is configured to couple the sense transistor to a ground responsive to the drive current flowing in a second direction, that is opposite the first direction, through the low-side drive transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.